Voir la notice de l'article provenant de la source Math-Net.Ru
@misc{KVANT_2022_1_a10, title = {{\CYRZ}{\cyra}{\cyrd}{\cyra}{\cyrch}{\cyri} 17{\textendash}20}, journal = {Kvant}, pages = {43}, publisher = {mathdoc}, number = {1}, year = {2022}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/KVANT_2022_1_a10/} }
Задачи 17–20. Kvant, no. 1 (2022). http://geodesic.mathdoc.fr/item/KVANT_2022_1_a10/